[Exercise 03] Caesar Cipher Decoder

3 like 0 dislike
4.3k views

You have received an encrypted message from Julius Caesar-- the message is ebiil.  You are asked to decipher the message in order to understand what Caesar trying to say to you.

Hint

Luckily, Caesar has given you a hint, he says: 'I, myself, encoded the message by shifting every word backwards by 3.' 

Solution

Write a program that receives 5 characters 'ebiil'. Then decode those characters into 5 new characters.

Example

#include <stdio.h>

int main(int argc, char *argv[]) {


	char a;
    	char b;
	 	
	scanf("%c%c", &a, &b);
	
	//decode the message how??
	
	printf("%c%c", a,b);
	
	return 0;
}

Input

ebiil

 

 

 

 

 

 

 

 

 

 

Output

hello

** REMEMBER ** 
This is an online-compiler, don't put anything except the codes. If you want to make a comment, please use // or /* */

[Exercise] Coding (C) - asked in Chapter 2: Syntax structure of the C language by (5.9k points)
ID: 26955 - Available when: Unlimited - Due to: Unlimited
edited by | 4.3k views

22 Answers

0 like 0 dislike 
Hidden content!
 ** *    ** * * * * * * 

int   * * argc, char      {
  * * ***    *      * *    * *** */

* * *    **    int number;
  *   ** ** * *  char a;
 * **      ** *****   **** b;
  *   ****  * * *** * ****  *  *  c;
   * *   *** * **  * ******* *** *  d;
*   * * ** * **      ****   *  * e;
****   *  ******    ** *  
 *** ** *  *   **** *  forgert how to shift word * *** * * ** *  ****  
***** **** *  *  *** * *    **              *  ****  * * *** **     *** *  * ** 
   ***      *    
 ***  * ** **** **  ***   the message how??
 ******* * *  *** 
 ** *  *  *   *  *** *   *****    * ****  ** *
 *  *  *   * ** 
*  *    **   return 0;
}
100/100 answered by (449 points)
edited by
0 0
Case 0: Wrong output
Case 1: Wrong output
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
0 like 0 dislike 
Hidden content!
  *  ** ****** ****  ***

  * ***    * ***    ***   *   {

 **  ** *
 = *  *** *
     *  **  *
   = ** * **
 = * **  *
  = * *  * 

* = *  
 = * 
  =  * 
* = ** *

 *******
** ******
** * ** *
 *  ** 
 ****  **
*
***   ***  ** ***   *    
**
100/100 answered by (153 points)
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
#include   ** * ***    * *
#include  ****   ***  * 

/* run this program using the console pauser or add your own getch, * ** ***  ** * ** or input loop */

int main(int argc, char *argv[]) {
  *  *  * ** *  ***   *  * **  a;
**  *  *   ** * **  * ****   b;
** *  ***    ******* **** ***** *   c;
*  *         **  *      *  d;
*** ** *   *  *** *  ***  ** e;
  ****    *  *** ** * **********
* *****     *       ** * *  * ** ** *   **     the words you want to *   ***  *
    *  * * ** * ** *** * * 
***  *  ***  *****  * *** = getchar();
*      *    *       *** *    * = a+3;
  ***** *     * ***  * **** ***  *
** **       ** *  *  ** * *  = getchar();
    *  * **  * ****  *    = b+3;
    * **  *  **      ********* * *   *
***    ** ** ** ***    *  ** = getchar();
** *  ***** *      * *   = c+3;
 * *  *    * * *  *   **  ***      * 
** *** *** * ** ** *   *  = getchar();
  **   * *     * **** *  *  * = d+3;
* *  **  * ** *   * ** ** ****  **
  *   * ***** ** ** **     **  = getchar();
  * **    * * ** **** * ** ****  = e+3;
***     * **  *     ****  * ***  
  *** *****  **  *** *  ****   * **  *   **** ** **  * **** *   *
*  * *******  *    * ** * ****  *  *     *  * * *    * &a, &b, &c, &d,  **  *    
* **    ** * ** *   **  **  *
****  **    *   *  *   **   *** ** the message how??
** ****    ***** ** *  *  * *
 * **** ******** *   * *   ** * * ** *** **** ** a, b, c, d, e);
****** *  * * ** *   ****  
**** ***    * *** ** * *    0;
}
100/100 answered by (281 points)
edited by
0 0
Your program receives only 2 characters, and it doesn't move characters' positions.

Try to make it receive 5 characters, and move their positions forward by 3.
commented by (5.9k points)
0 0
This exercise expects only 'hello'. However, your code has.....

printf("Put the words you want to decode:");

Kindly consider delete this part :)
commented by (5.9k points)
1 like 0 dislike 
Hidden content!
******      ****     
* * * *  *   *** **  * * 

int   ***   *   char   *  {
/*
  * *  *  ** */

  *  **    *

 * * **** *** ** *** ****  *  * *  * *    ***  ** ** *   * * *    ****   
a = a+3;
b = ** 
c = **
d = d+3;
e =  **

 * **** the   ***    
***   * **    ***  
 * ** ****** * ****    ****  *** *   

   *       ** *  *******
 * ** * **** * * *   *  ******  0;
}
100/100 answered by (273 points)
edited by
0 0
prog.c:28:1: error: unknown type name 'INPUT'
 INPUT
 ^~~~~
prog.c:32:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'OUTPUT'
 OUTPUT
 ^~~~~~
prog.c:32:1: error: unknown type name 'OUTPUT'
commented by (4.3k points)
0 0
Your program can end at
  
    return 0;
}
------------------------------------------
You don't need to put

INPUT

ebiil

OUTPUT

hello
commented by (5.9k points)
0 0
Case 0: Correct output
Case 1: Wrong output
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
  * **  ** **  ** *
 * *   *  *  ** **

/* run this ** *** the ****  **    or add your own       ** ***   *  * ** **** * * or *    *   */

int *    *** char **** *  {
*** ***    *  * int num, * * 
*     **   * * **    *  *  *  *
 ** *  ***  
 ** *   *  **   **      **** ***   ** * * *
**   *  * **  for *   = * *  ** **  
{
*** **  ** ** * **     = ** *  *
**** **  *   *   * if  ** *   *      
 *  * *     *** *     * =    * **** * 
 *   *    *    * **  * *
}
 * **** * *     ** *  * ***  * * * ** *   *  
*      * *  * * 0;
50/100 answered by (252 points)
0 0
prog.c: In function 'main':
prog.c:19:2: error: expected declaration or statement at end of input
  return 0;
  ^~~~~~
commented by (4.3k points)
0 0
Great job using an array and a loop. There are two mistakes found in your code. Please check
1.     printf("\n\n%s", code);  <--- in order to make it match the fixed output '\n\n' should be deleted
2.     At the end of your code, there's something missing.
commented by (5.9k points)
1 like 0 dislike 
Hidden content!
* ****              * *  *
*
*** ** * ** **  * ** **
*
* ** *  *  * *** ** *** **  *     * ***   *     ***        * *   ** ****  * **  *   *

*    *** ** **   **  ***  

        * 

 **  * **  *   *
 
**    ****  *  *  ********        *  ***  *    ** * **  ***  *    * * 
 
 * =   **

   * b +  

** = c + *

  = d +  

* *    **
 
   * ***    *  ** ** ** ***    **    ** *
 
  ** **
*
100/100 answered by (268 points)
0 0
It's correct lol you can't judge me
commented by (268 points)
0 0
Well, that's because your output doesn't match with the fixed answer. Please take a look at this
printf("%c%c%c%c%c\n", a1, b1, c1, d1, e1);

Hint: You should delete something  :)

By the way, great job.
commented by (5.9k points)
0 0
printf("%c%c%c%c%c", a1, b1, c1, d1, e1);

How's that?
commented by (268 points)
0 0
That's correct.
commented by (5.9k points)
1 like 0 dislike 
Hidden content!
**    ** *  ***** ****
*   * * *   *   *** * * 

int * *   ** argc, char * * {
* *** * *** * * char *    **
   **      *   char ***  *
 **    * ***   * char     ***
  **    *  *  *  char  *
**** ****   *    char  *  ** 
    *     *     
  ***        ***     ******   *  * input the letter to **  *** * **
 *   * *    * * *  
 *  **  * * **  *** * *  *****  **  ** *** *   *   *   ** * ** * * *** *** **            ** * ***** * 
*    ****    ** * * = ** + 3;
* * *     * *  *** * = ***  + 3;
      * * *  ***     *** = *  ** + 3;
   * * * * letterc = **  *  + 3;
 ** *    * ***        * * = ** **  + 3;
** *   ** * * 
***    *  ** *   * *****  *** *   ****** ** *  **     *  *  *   * *** *
* * **   * **  
   *  *  * return 0;
}
100/100 answered
reshown by
0 0
-----------Re-judge-----------
Case 0: Wrong output
commented by (4.3k points)
0 0
Nice, it is correct. You might be wondering why your automatically-generated score is 0.
That's because it expects its output to be only 'hello'. However, what your program showed was:
     Please input the letter to encode: ebiil
     hello

Anyway, great job. Full marks.
commented by (5.9k points)
1 like 0 dislike 
Hidden content!
 * *  **  **       *  
* *     **  * *** *  *

int ** ***  argc, char *argv[]) {
** *       *   char   **  
 * *****       * char letteri;
** * *  * * **    char * *  
      * **  char  * **
 * * **  * *  ** char ***  
  *         ** 
**** *****  **  **  ****  input the letter to encode:   ** ***   * **   
 ** **   **     
**   ***  *** ** ***    *** **    **  ***  * *   ****    * *  *  * **  * *** *** *   *  ** *   * *   *  *** 
 **** * *  * ** *  *****  **  +3;
 ***** * ***   *     *  +3;
******    *   **  *  * ** +3;
** **   ***    *  **  * +3;
  **      *   *   *   +3;
 *****     **  
 ****     * *  * 
** *** * ** *   ***  *****  ***** *  ** ** ****    ********** *****      *   
*   ***  **  *  
***  **   *     return 0;
}


INPUT
* *****   *     **
*  ** **** 
OUTPUT
         ** *** *
100/100 answered by (269 points)
0 0
Nice, it is correct. You might be wondering why your automatically-generated score is 0.
That's because it expects its output to be only 'hello'. However, what your program showed was:
     Please input the letter to encode: ebiil
     hello

Also, it's an online compiler, if you want to make a comment don't forget to use //. For example, //input ebiil
//output hello

Anyway, great job. Full marks.
commented by (5.9k points)
0 0
prog.c:27:1: error: unknown type name 'INPUT'
 INPUT
 ^~~~~
prog.c:30:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'OUTPUT'
 OUTPUT
 ^~~~~~
prog.c:30:1: error: unknown type name 'OUTPUT'
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
   *   * * * *    ****
 ** * ***** **  **** * 

int  **** argc, char  ** *  {
*    *** ** * ** char   ***
   *  *  **  ***  char  *  *
        *******   char **    
*  *  * * *  * * char  *** 
* *** * * * * * * char       *
**   ****  **** 
*  ***    ** * ***   * * * * *     * input the ** ** to *  * **    **   ***  *
* *   ** * * 
  *** *  **** * ** **  *   * * *  *  **  *  **   *    *    ***  **  *******  **    * *    ** * * ***
  *** *      *   
* ***      *  *  letter = letter + 3;
 *   ***   ***  * ** = *** *  + 3;
**  * *  * * * *  ** * = * ** + 3;
   *   *    *     =   *  + 3;
 *   *  *   **   ** = *   + 3;
 * ** *  * *   *  
*  *** **** *   **  *  *****  **  *     letter is * *****   *  *  *  ** * ** * **   *   *   ***
***  ****   *      
*   ***  *****  return 0;
}

INPUT
 * *  *  *  * * * *  
* **  **** ***
     
*** * ****   **
100/100 answered by (290 points)
reshown by
0 0
Nice, it is correct. You might be wondering why your automatically-generated score is 0.
That's because it expects its output to be only 'hello'. However, what your program showed was:
     Please input the letter to encode: ebiil
     The encrypted letter is hello

Also, it's an online compiler, if you want to make a comment don't forget to use //. For example, //input ebiil
//output hello

Anyway, great job. Full marks.
commented by (5.9k points)
0 0
prog.c:26:1: error: unknown type name 'INPUT'
 INPUT
 ^~~~~
prog.c:29:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'OUTPUT'
 OUTPUT
 ^~~~~~
prog.c:29:1: error: unknown type name 'OUTPUT'
commented by (4.3k points)
1 like 0 dislike 
Hidden content!
#include      *     *   

int main(int argc, char *argv[]) {
***** *** * * *  * **   * *** lettera;
  * **  * * * ***** *       * letterb;
**** * * **** ** *****   ***** *  letterc;
 **    *** *  ** **** * * * **** letterd;
**     ** * **    *     * ***  lettere;
**** ** ***  *****  * *    
   ******* *    *  *** * **   ** **  ** * %c %c %c **    **  * **       ** *****   *** ****  ** ** * * ***  * *******    
     ** ** * * ** **** ***** *  *** = lettera + 3;
 **  * **  ** *** ** ***  *   * * **  = letterb + 3;
   * *  ** *  ***  *    *  * ** ** = letterc + 3;
***   *   *    **  * ** *  *  **  = letterd + 3;
**    ** ****** ** *  * * *** *     = lettere + 3;
*** ** ****** *   **     ***** ****   **** *** *** ** ***
 ** * ***** *      *** * *** *  * * %c %c %c  *** * **  ** *  letterb,  *    *  ** ** * * 
 **    * ****** ****  **   
 *** *** ** *****   *** *   * 0;
}

** *
***  
 **  **** **
*  ** 
//hello
100/100 answered by (271 points)
edited by
0 0
Nice, it is correct. You might be wondering why your automatically-generated score is 0.
That's because it expects its output to be only 'hello'. However, what your program showed was:
     Please input the letter to encode: e b i i l
     h e l l o

Also, it's an online compiler, if you want to make a comment don't forget to use //. For example, //input ebiil
//output hello

Anyway, great job. Full marks.
commented by (5.9k points)
0 0
prog.c:25:1: error: unknown type name 'INPUT'
 INPUT
 ^~~~~
prog.c:28:1: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'OUTPUT'
 OUTPUT
 ^~~~~~
prog.c:28:1: error: unknown type name 'OUTPUT'
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:10:5: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
     scanf("%c %c %c %c %c", &lettera, &letterb, &letterc, &letterd, &lettere);
     ^~~~~
prog.c:10:5: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:10:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:17:5: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
     printf("%c %c %c %c %c", lettera, letterb, letterc, letterd, lettere);
     ^~~~~~
prog.c:17:5: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:17:5: note: include '<stdio.h>' or provide a declaration of 'printf'
commented by (4.3k points)
Page:
Welcome to Peer-Interaction Programming Learning System (PIPLS) LTLab, National DongHwa University
English 中文 Tiếng Việt
IP:172.71.254.111
©2016-2025

Related questions

0 like 0 dislike
2 answers
Shifting backward
[Normal] Essay (Open question) - asked Dec 12, 2017 in Chapter 2: Syntax structure of the C language by 許哲瑋 (449 points)
ID: 37081 - Available when: Unlimited - Due to: Unlimited | 681 views
12,783 questions
183,442 answers
172,219 comments
4,824 users